标题
作者
作者:Cheng, YM (Cheng, Youmin)[1 ]; Ji, SM (Ji, Shaomin)[1 ]; Xu, XJ (Xu, Xijun)[1 ]; Liu, J (Liu, Jun)[1,2 ]
期刊信息
摘要
A novel activated carbon material is prepared by pyrolysis of natural wheat straw waste with KOH activation. This carbon contains abundant micropores, possessing a large BET surface area of 1066 m(2) g(-1) and total pore volume of 0.62 cm(3) g(-1) with an average pore size of 2.33 nm, which can enhance the adsorption of polysulfides and sulfur by capillary force. The treated carbon is used to synthesize a wheat straw carbon (WSC)/S composite as the cathode of Li-S batteries for the first time. The WSC/S composite with 74 wt% sulfur content exhibits a high initial discharge capacity of 1213 mA h g(-1) at 0.1C (1C = 1675 mA g(-1)) with coulombic efficiency of 95% and a superior rate capability. Even when cycling at 1C, the first and the 200th specific discharge capacity of 582 mA h g(-1) and 445 mA h g(-1) are retained, respectively, along with a low fading rate of 0.11% per cycle, which suggests that the WSC/S composite could be a type of promising material for cathodes of Li-S batteries.
关键词
KeyWords Plus:LITHIUM-ION BATTERIES; RECHARGEABLE LITHIUM; MESOPOROUS CARBON; ACTIVATED CARBON; LONG-LIFE; GRAPHENE; PERFORMANCE; ELECTROLYTE; ANODE; NANOCRYSTALS
作者信息
通讯作者地址:Ji, SM (通讯作者)
 | Xiangtan Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Low Dimens Mat & Applicat Technol, Xiangtan 411105, Peoples R China. |
地址:
电子邮件地址:smji@xtu.edu.cn; jliu@xtu.edu.cn
出版商
类别分类
研究方向:Chemistry
Web of Science 类别:Chemistry, Multidisciplinary